package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {




    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;
    /**
    * @Description: 根据id删除分类，删除之前需要进行判断
            * @Param: 
            * @return: 
            * @Author: Lei
            * @Date: 
     */

    @Override
    public void remove(Long id) {

        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper=new LambdaQueryWrapper<>();
        /**添加查询条件，根据分类id进行查询*/

        /**查询当前分类是否关联菜品，如果已经关联，抛出一个业务异常*/
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int count_dish=dishService.count(dishLambdaQueryWrapper);

        if (count_dish>0) {
            /**已经关联菜品，抛出一个业务异常*/
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }



        /**查询当前分类是否关联套餐，如果已经关联，抛出一个业务异常*/
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper=new LambdaQueryWrapper<>();
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int count_setmeal =setmealService.count(setmealLambdaQueryWrapper);
        if (count_setmeal>0) {
            throw new CustomException("当前分类下关联了套餐 ，不能删除");
        }


        /**正常删除分类*/

        super.removeById(id);

    }
}
